My motor seems to suffer badly from condensation inside. Looking round the rear R/H space by the wheel arch behind the access panel it is quite wet. Any ideas as to cause ?

R/H, definitely R/H?

 

That's where the extract vents are, behind the trim. So if one of the one-way valves isn't closing properly...

Defo R/H (it's an estate ). What am I looking for ?

There's a couple of sort of boxy things that look like they're stuck on the inside of the wing.

My motor seems to suffer badly from condensation inside. Looking round the rear R/H space by the wheel arch behind the access panel it is quite wet. Any ideas as to cause ?

Does your car have a sunroof? As thats where the drains run out for the rear of the sunroof. Do you also mean RH as looking inside the boot from rear? They also suffer from the rear washer pipe leaking under the CD changer on the Left as you look in the boot, also they have a habit of leaking throught where the boot hinges are on the body, a good clean up and clear silicone sealant as the sealant used can crack over the years, they also suffer with water getting under the boot seal, the fix is to silicone the rubber onto the boot apature. I have had all these issues and after rectifying all the above I have a dry boot. There are also other leaks that occur in the front of the cars too, most of these have been covered on a number of threads on here. I have now got 4 old socks filled with silicone cat litter (has to be the silicone version) in all 4 door pockets in the car and am condensation free. Hope this helps in some way?

Does your car have a sunroof? As thats where the drains run out for the rear of the sunroof. Do you also mean RH as looking inside the boot from rear? They also suffer from the rear washer pipe leaking under the CD changer on the Left as you look in the boot, also they have a habit of leaking throught where the boot hinges are on the body, a good clean up and clear silicone sealant as the sealant used can crack over the years, they also suffer with water getting under the boot seal, the fix is to silicone the rubber onto the boot apature. I have had all these issues and after rectifying all the above I have a dry boot. There are also other leaks that occur in the front of the cars too, most of these have been covered on a number of threads on here. I have now got 4 old socks filled with silicone cat litter (has to be the silicone version) in all 4 door pockets in the car and am condensation free. Hope this helps in some way?

I've got a page from a workshop manual (real workshop manual, not Haynes) that shows the rear sunroof drains running down the leading edges of the rear arches, not the trailing edges.

I've got a page from a workshop manual (real workshop manual, not Haynes) that shows the rear sunroof drains running down the leading edges of the rear arches, not the trailing edges.

Whether its the leading edge or trailing edge of the rear arch if there not fitted there will be water in there. The vents that are there are only there to relieve the difference in the air pressure when shutting the doors or boot or having the fan running and only have a rubber flap on them, so unless the rubber flap is completely missing then they will not let water in.

Edited 8 November, 20169 yr by Guest

No sunroof, removed the tray behind the trim panel and its wet in there. Found those 2 vents , doesn't seem to be anything to them ?

No sunroof, removed the tray behind the trim panel and its wet in there. Found those 2 vents , doesn't seem to be anything to them ?

Only way I found my leaks in the end was to strip the entire rear panelling out of the car and keep checking after it rained or it was washed (didn't always happen when washed).

Strip out the rear trim around the affected area, then get a watering can with a mix of water and food colouring and pour it over the back of the car, should be able to see where it's coming from them. Other option is some UV leak detector fluid and a UV blacklight, or even some talc and a bucket of water (or a drive through car wash). You can get some stuff from the boat industry called Captain Tolleys Creeping Crack Cure (ooer mssus) - uses capilliary action to draw itself through any cracks and seals them, used it on my disco to great effect on the roof gutters where the sealer had cracked.

+1 on Captain Tolleys, used it many times myself to very good effect.